Steel structure parts always use big thickness plate, so robot need weld several times for each weld seam.
We use arc sensor and touch sensor for this application. the operator only need to program one time, then the robot will weld several times with arc sensor. we have the best steel structure industry applications in China, and we have a lot of different kinds of applications in steel structure industry.
With the positioner, the robot can reach different position on the welding parts.
Fulzh robot, You name it, we have it, at a very good price.